Anisotropic models of elliptical galaxies. I - The case of circular isophotes

Details Anisotropic models of elliptical galaxies. I - The case of circular isophotes Anisotropic models of elliptical galaxies. I - The case of circular isophotes

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...128..405b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 128, no. 2, Dec. 1983, p. 405-410.

Astronomy and Astrophysics

Astrophysics

18

Anisotropy, Astronomical Models, Elliptical Galaxies, Isophotes, Radial Velocity, Angular Momentum, Dynamic Models, Velocity Distribution

Scientific paper

A formal solution is presented for the most general dynamical model of axisymmetric - oblate and prolate - galaxies, where one axis of the velocity ellipsoid is pointing towards the center. Applied to face-on ellipticals it shows that, for a given anisotropy, solutions for various axial ratios are practically similar except for a scale factor. Compared to observations, models of NGC 4472 show evidence for a marked anisotropy with an excess of radial motions, while NGC 3379 does not allow a discrimination between isotropy and moderate anisotropy.

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